var createError = require('http-errors')
var express = require('express')
var path = require('path')
var cookieParser = require('cookie-parser')
var logger = require('morgan')

var indexRouter = require('./routes/index')
var usersRouter = require('./routes/users')

var studentApi = require('./api/student')
var teacherApi = require('./api/teacher')
var testApi = require('./api/test')

var app = express()

// view engine setup
app.set('views', path.join(__dirname, 'views'))
app.set('view engine', 'jade')

app.use(logger('dev'))
app.use(express.json())
app.use(express.urlencoded({ extended: false }))
app.use(cookieParser())
app.use(express.static(path.join(__dirname, 'public')))

app.all('*', function (req, res, next) {
  res.header('Access-Control-Allow-Origin', '*')

  //Access-Control-Allow-Headers ,可根据浏览器的F12查看,把对应的粘贴在这里就行

  res.header('Access-Control-Allow-Headers', 'Content-Type')

  res.header('Access-Control-Allow-Methods', '*')

  res.header('Content-Type', 'application/json;charset=utf-8')

  next()
})

app.use('/', indexRouter)
app.use('/users', usersRouter)

app.use('/api/student', studentApi)
app.use('/api/teacher', teacherApi)
app.use('/api/test', testApi)

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404))
})

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message
  res.locals.error = req.app.get('env') === 'development' ? err : {}

  // render the error page
  res.status(err.status || 500)
  res.render('error')
})

module.exports = app
